High-temperature gas-burner.



. A. EIMER. HIGH TEMPERATURE GAS BURNER. APPLICATION FILED FEB. a, 1912.

1,062,640. Patented May 27, 1913.

COLUMBIA PLANDGRAPH C0.,WASHINIJTON, D. c.

ture is required to be intensified.

AUGUST EIMER, OF NEW YORK, N. Y.

HIGH-TEMPERATURE GAS-BURNER.

' Specification of Letters Patent.

Patented May 27, 1913.

Application filed February 3, 1912. Serial No. 675,263.

To all whom it may concern Be it known that I, AUoUsT EIMER, a citizen of the United States, and resident of the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in High-Temperature Gas-Burners, of which the following is a specification.

This invention relates to high temperature gas heatingappliances and my improvements comprise certain novel features which may be briefly summarized as follows: 1. Means as by the employment of an internal draft chamber within a burner tube of the Bunsen type, to increase the draft or pressure with which the mingling air and gas are supplied to the combustion surface, and a mixing chamber between said draft channel and combustion surface. 2. A burner cap composed of or surrounded by material which is a non-conductor of heat, to prevent heating unduly the supporting burner tube. 3. Means as a wire mesh screen, within the burner tube, to prevent back firing. 4. Means as a hollow needle, extending from the gas valve to a point between the nipple and combustion surface, to supply a blast pressure when the tempera- 5. The provision of a telescoping extension tube for burners as a means of regulating the draft therein.

I11 the drawing: Figure 1 is a vertical sectional view of my improved burner; Fig. 2 is a top plan view thereof; Fig. 3 is a vertical sectional view of a modified form of the device showing the inclusion of the heat intensifying blast device; Fig. 4 is a view similar to Fig. 1, but showing a modified form of draft tube. Fig. 5 is a vertical section of a burner cap with non-conducting ring, and Fig. 6 is a top plan view thereof.

In high temperature gas burners with air inlets and having foraminous burner caps for finely dividing the gaseous mixture into numerous jets prior to combustion, often the pressure of air is insufficient to prevent back firing of the flame, and the highest temperatures are not attained. In overcoming these deficiencies I provide an internal draft tube, as 1, within the usual burner tube, as 2, which has the air inlets 3, and is mounted on support 1. Draft tube 1 has suitable sup-porting means, as the flanges 5, 6, by which it is frictionally supported and centered within burner tube 2.

Further, the relative length and disposition as to height within the burner tube of said draft tube may be varied according to requirements. Obviously, as seen in Fig. 1, the position of draft tube 1, with its lower flange 5, determines the extent of the initial mixing chamber, into which gas enters through orifice 3 and air through ports 3, the capacity of the latter being governed by a regulating sleeve 9. The restricted cross-sectional area of tube 1 increases the draft, causing the mixture to be more effectively consumed at the burner cap.

As also illustrated in Fig. 1 I may render the burner tube adjustable as to length by adding thereto a sliding or telescoping extension 10 whereby the draft may be varied by moving said extension in or out. The burner cap, as shown in Figs. 1 and 2, consists of a thick plate of suitable heat non-conducting material, as 11, pierced with a number of channel-like apertures, as 12, to emit a series of small adjacent jets in promoting high temperature combustion. Said burner cap is fitted within the upper end of the burner tube, and is shown as having the tubular extension 13. Being a non-conductor of heat, the cap 11 will not heat up the burner tube, thus serving the useful function of enabling the burner tube to be conveniently handled without burning the user, and also by the avoidance of heat at the burner cap, preventing the flame from striking down. The material I use for the burner cap may be fused alumina, fused magnesia or fused silica, these materials possessing to a high degree the quality of being non-conductors of heat whereby they supply the function, in a high temperature burner, of enabling the burner tube to remain cool so that it may be handled by an operator while the burner is in use with an intensified flame extending from the burner cap. A screen 14, as of wire mesh, may be disposed suitably within the burner tube, the purpose thereof being to provide a furgher safeguard against the danger of back In Fig. 4, will be seen a modified form of draft tube, a Venturi tube, as 15, being here indicated as typical of draft increasing devices which I may employ. Piezometer tubes 16 extend from the throat of the Venturi to the outer atmosphere, thus adding by suction to the air pressure applied.

In Fig. 3, I have shown the needle valve 17, which engages the conical seat 18 and regulates or shuts off the gas supply. Said needle valve is hollow, and has a tubular extension 19, which extension rises centrally within the burner tube to a point near or suitably distant from the rear of the perforated cap. Also said needle valve has threaded means, as 20, enabling it to be moved in regulating and closing the gas inlet. Pressure means, as a bulb 21, connecting by tube 22 with the lower end of the hollow needle valve, permit blasts of air or fuel to be supplied directly beneath the burner cap at any suitable distance from said cap in order to further intensify the heat of combustion when required.

In Figs. 5 and 6 I have shown a wire mesh cap 23 for the burner tube, with a ring 2st of heat non-conducting material supporting said wire mesh and separating it from the tube.

I claim:

1. A tubular gas burner having a foraminous cap, and an initial mixing chamber with air inlets, together with an internal draft tube wholly contained and supported in manner to be axially adjustable intermediate said cap and mixing chamber.

2. A tubular gas burner having a foraminous cap, and an initial mixing chamber together with an internal draft tube located intermediate said cap and mixing chamber, and a flange upon said draft tube frictionally supporting it in axially adjustable manner within said burner tube.

3. A tubular gas burner having a foraminous cap, and an initial mixing chamber, together with an internal draft tube wholly contained and supported intermediate said cap and mixing chamber, and means for intensifying the pressure at a point between the draft tube and burner cap.

4. A tubular gas burner having a foraminous cap, and an initial mixing chamber with air inlets therefor, an internal draft tube between the initial mixin chamber and cap, an orifice in the mixing chamber, a hollow needle valve to regulate and close said orifice, an upward tubular extension of said needle valve and means introducing pressure blasts through said extension to said cap.

5. A tubular gas burner formed of telescoping sections, a foraminous cap therefor and an initial mixing chamber, air inlets for said mixing chamber, an internal draft tube wholly contained and supported intermediate the initial mixing chamber and burner cap, and means for intensifying the pressure at said burner cap.

6. A tubular gas burnerhaving a foraminous cap, and an initial mixing chamber with air inlets, a wire mesh partition in said burner, an internal draft tube between said partition and the initial mixing chamber, and means for intensifying the pressure at said burner cap.

7. A high temperature gas burner c0mprising a burner tube having an initial mixing chamber with air inlets, a draft increasing tube within said burner tube, and a tubular, foraminous topped burner cap of heat non-conducting material fitting within said burner tube, the heat zone of said burner cap being separated by the tubular portion of said cap from said burner tube.

Signed at the borough of Manhattan in the city, county and State of New York, this 1st day of February, A. D. 1912.

AUGUST EIMER.

Witnesses:

F. WV. BARKER,

Sanm R. SEMLEAR.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

